Modern PLC with external equipment introduction to the high speed data exchange rate trends

High speed data exchange rate with external devices. PLC controller CPU module through the system bus ( In the printed circuit substrate) do you usually do And put in the substrate of various I/O module, special function module, communication module, such as data exchange, module of interpolation, the CPU module and the module of data exchange between time will increase. The increase of the data exchange of time, to a certain extent can make PLC controller scan time longer. Therefore, it is necessary to take the following measures to make the system high speed bus transmission speed, increase the bandwidth of the system bus make an increase in the amount of data transferred at a time, small Q series PLC controller of mitsubishi electric, for example, has added to the system bus bandwidth, transmission by the amount of data is the previous 2 times; On the way of the system bus access, continuous group transfer technique was adopted to realize continuous high-speed mass data transmission, greatly shortens the time needed for access to every word; Through to the connected to the system bus module implements the global transmission, or send the same data at the same time for multiple modules, effectively with the system bus.
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